22
MICRO T1 CSU/DSU
Appendix A. Cable
Recommendations
The Micro T1 CSU/DSU operates at frequencies of 20 kHz or less and has been
performance tested using twisted-pair cable with the following characteristics:
Wire Gauge
Capacitance
Resistance
19 AWG
83 nf/mi. or 15.72 pf/ft.
0.0163 ohms/ft.
22 AWG
83 nf/mi. or 15.72 pf/ft.
0.0326 ohms/ft.
24 AWG
83 nf/mi. or 15.72 pf/ft.
0.05165 ohms/ft.
For optimum performance:
•
Always use twisted-pair wire
; this is not an option.
• Use twisted-pair wire with a capacitance of 20 pF/ft. or less.
• Avoid twisted-pair wire thinner than 26 AWG (avoid higher AWG numbers
than 26).
• Use of twisted pair with a resistance greater than the specifications above may
cause a reduction in maximum distance obtainable. Functionality should not
be affected.
• Many environmental factors can affect the maximum distances obtainable at a
particular site. Use the data-rate/distance table above as a general guideline
only.
